Development of High Strength Cu Alloys of Heusler Matrix with good Workability and Ductility

具有良好加工性和延展性的Heusler基高强度铜合金的研制

• 批准号: 03555151
• 负责人: ISHIDA Kiyohito
• 金额: $ 8.45万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03555151/
• 关键词: Cu-Mu-Al; HEUSLER'S ALLOY; ORDER-DISORDER TANS.; MECHANICAL PROPERTIES; PHASE DIAGRAM; INTERMETALLIC COMPOUND; HIGH STRENGTH Cu ALLOY; WORKABILITY; ホイスラー相; 高加工性; 銅合金; 性態図; 規則・不規則変態

The Cu_2MnAl Heuser alloy which is well known as magnetic material is very brittle and had not been fabricated by conventional rolling. In this work, we have tried to enhance the strength, ductility and hot workability of the Cu-Mn-Al alloys by microstructural control based on information of phase diagrams.(1)Phase equilibria in Cu-Mn-Al system : Phase equilibria among alpha, beta and gamma phases at 500。C, 600。C, 700。C and 800。C were determined. It was clarified that addition of Mn stabilizes the beta phase.(2)Order-disorder transition in the beta phase : A2<greater than or equal>B2<greater than or equal>L2_1 order-disorder transition temperatures (Tc) were measured by DSC.The Tc strongly depends on(3)Mechanical properties : The Cu-Mn-Al Heuser alloys with non-stoichiometric composition is very ductile and strong, while that at the stoichiometry is brittle. In the non-stoichiometric region, it was shown that the alloys have good mechanical properties with elongation of (3-21)%, 0.2% proof strength in the region of (500-700)MPa and tensile strength in the region of (700-1010)MPa.(4)Microstructure and mechanical properties : The features of mechanical properties in these alloys could relate to the order-disorder transition temperatures and spinodal decomposition which occurs at low temperatures.

众所周知的磁性材料Cu_2MnAl Heuser合金非常脆，无法通过常规轧制制造。在这项工作中，我们尝试通过微观结构控制来提高Cu-Mn-Al合金的强度、延展性和热加工性。基于相图信息。(1)Cu-Mn-Al系中的相平衡：500时α、β和γ相之间的相平衡。摄氏度，600。 C，700。 C和800。确定了Mn的添加使β相稳定。(2)β相中的有序-无序转变：A2<大于或等于>B2<大于或等于>L2_1有序-无序转变温度(Tc)。 ）由 DSC 测量。 Tc 很大程度上取决于（3）机械性能：具有非化学计量成分的 Cu-Mn-Al Heuser 合金非常具有延展性和强度，而在在非化学计量区域，合金具有良好的力学性能，伸长率为(3-21)%，屈服强度在(500-700)MPa范围内为0.2%，抗拉强度在(500-700)MPa范围内。 (700-1010)MPa范围内。(4)显微组织和力学性能：这些合金的力学性能特征可能与有序-无序转变温度和在低温下发生旋节线分解。

项目成果

R.Kainuma: "Phase Equilibria in the Cu-Mn-Al System" Metallurgical Transactions. (発表予定).

R.Kainuma：“Cu-Mn-Al 系统中的相平衡”冶金学报（待提交）。

R.Kainuma: "Phase Equilibria in the Cu-Mn-Al System" Metallurgical Transactions. (発表予定).

R.Kainuma：“Cu-Mn-Al 系统中的相平衡”冶金学报（待提交）。

R.Kainuma, S.Takahashi and K.Ishida: "Order-disorder Transformation of BCC Phase in Cu-Mu-Al Alloys" Metallurgical Transactions A. (to be submitted).

R.Kainuma、S.Takahashi 和 K.Ishida：“Cu-Mu-Al 合金中 BCC 相的有序-无序转变”Metallurgical Transactions A.（待提交）。

R.Kainuma: "Order-diaorder Transformation of BCC Phase in Cu-Mn-Al System" Metallurgical Transactions. (発表予定).

R.Kainuma：“Cu-Mn-Al 系统中 BCC 相的有序-二序转变”冶金学报（待提交）。

R.Kainuma, N.Sato and K.Ishida: "Phase Equilibria in the Cu-Mu-Al System" Metallurgical Transactions A. (to be submitted).

R.Kainuma、N.Sato 和 K.Ishida：“Cu-Mu-Al 系统中的相平衡”Metallurgical Transactions A.（待提交）。